How to find dy/dx by implicit differentiation of 3x^2-4y^2=25?

Ill mark the brainliest if you me with the these three questions 7,8,9

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?